3 All notable changes to this project will be documented in this file.
5 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
6 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
10 ## [3.1.18] - 2024-01-06
14 - Fix dynamic pool with minimum number of workers set to zero: [#1748](https://github.com/poolifier/poolifier/issues/1748).
16 ## [3.1.17] - 2024-01-05
20 - Improve performance by clean up unneeded condition checks on hot code paths.
22 ## [3.1.16] - 2024-01-03
26 - Add missing type to TS type definitions.
28 ## [3.1.15] - 2024-01-02
32 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
34 ## [3.1.15-0] - 2024-01-02
38 - Fix CommonJS support with TypeScript: [#1821](https://github.com/poolifier/poolifier/issues/1821).
40 ## [3.1.14] - 2024-01-01
44 - Properly handle dynamic pool with zero minimum size.
46 ## [3.1.13] - 2023-12-30
50 - Reduce branching in several hot code paths.
51 - Use faster object cloning implementation.
53 ## [3.1.12] - 2023-12-27
57 - Fix tasks redistribution triggers at pool destroying.
61 - Switch TypeScript module resolution to Node16.
63 ## [3.1.12-0] - 2023-12-27
67 - Fix tasks redistribution triggers at pool destroying.
69 ## [3.1.11] - 2023-12-24
73 - Avoid worker node cross tasks stealing.
74 - Ensure only half the pool worker nodes can steal tasks.
76 ## [3.1.10] - 2023-12-23
80 - Avoid useless branching on pool type.
82 ## [3.1.9] - 2023-12-22
86 - Readd ThreadPoolOptions and ClusterPoolOptions TS type aliases to PoolOptions.
88 ## [3.1.8] - 2023-12-21
92 - Fix default worker weight computation.
93 - Fix possible null exception at pool destroying.
95 ## [3.1.7] - 2023-12-20
99 - Ensure worker choice strategies implementation wait for worker node readiness: [#1748](https://github.com/poolifier/poolifier/issues/1748).
101 ## [3.1.6] - 2023-12-18
105 - Fix pool destroying with tasks queuing enabled.
107 ## [3.1.5] - 2023-12-18
111 - Add queued tasks end timeout support to worker node termination.
113 ## [3.1.4] - 2023-12-18
117 - Make more robust the fix for possible null exception at handling task execution response.
119 ## [3.1.3] - 2023-12-17
123 - Fix possible null exception at handling task execution response.
125 ## [3.1.2] - 2023-12-17
129 - Wait for queued tasks to end at worker node termination.
131 ## [3.1.1] - 2023-12-16
135 - Fix pool options TS type definition.
137 ## [3.1.0] - 2023-12-16
141 - TypeScript breaking change: merge ThreadPoolOptions and ClusterPoolOptions types into PoolOptions type.
143 ## [3.0.14] - 2023-12-13
147 - Fix possible null exception with worker_threads pools.
149 ## [3.0.13] - 2023-12-12
153 - Ensure worker choice strategy wait for worker nodes readiness.
157 - Remove infinite retries support in worker choice strategy to avoid configuration leading to possible infinite recursion or loop.
159 ## [3.0.12] - 2023-12-12
163 - Add infinite retries support in worker choice strategy.
165 ## [3.0.11] - 2023-12-11
169 - Ensure pool asynchronous resource properly track tasks execution.
171 ## [3.0.10] - 2023-12-08
175 - Add a fastpath when tasks stealing or redistribution is impossible.
177 ## [3.0.9] - 2023-11-26
181 - Remove all pool events listener at pool destroying.
182 - Remove all worker node events listener at worker node destroying.
183 - Fix worker node event emitter listeners handling memory leak at pool options runtime change.
185 ## [3.0.8] - 2023-11-25
189 - Ensure continuous tasks stealing on idle start at worker node idling.
191 ## [3.0.7] - 2023-11-24
195 - Make continuous tasks stealing start at worker node idling.
197 ## [3.0.6] - 2023-11-24
201 - Ensure pool statuses are checked at initialization, `start()` or `destroy()`.
202 - Ensure pool `ready` event can be emitted after several `start()/destroy()` cycles.
204 ## [3.0.5] - 2023-10-27
208 - Ensure pool `ready` event can be emitted only once.
210 ## [3.0.4] - 2023-10-20
214 - Switch to Bencher for benchmarking: [https://bencher.dev/perf/poolifier](https://bencher.dev/perf/poolifier).
215 - Use builtin retry mechanism in worker choice strategies instead of custom one.
217 ## [3.0.3] - 2023-10-19
221 - Avoid null exception at sending message to worker.
222 - Avoid null exception at checking worker node readiness.
224 ## [3.0.2] - 2023-10-17
228 - Fix race condition at dynamic worker node task assignment and scheduled removal. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468) and [#1496](https://github.com/poolifier/poolifier/issues/1496).
230 ## [3.0.1] - 2023-10-16
234 - Workaround possible race condition at work nodes array element removal and querying. See issue [#1468](https://github.com/poolifier/poolifier/issues/1468).
238 - Switch the worker node eventing code to `EventTarget` API.
240 ## [3.0.0] - 2023-10-08
244 - Remove Node.js 16.x.x (EOL) support.
246 ## [2.7.5] - 2023-10-03
250 - Use `EventEmitterAsyncResource` type from `@types/node` for pool event emitter. TypeScript users will need to update to latest `@types/node` version.
252 ## [2.7.4] - 2023-09-25
256 - Fix source maps (bundler issue).
258 ## [2.7.3] - 2023-09-24
262 - Convert pool event emitter to event emitter async resource.
264 ## [2.7.2] - 2023-09-23
268 - Add source maps to npm package to ease debugging.
272 - Continuous benchmarking versus other worker pools: [https://poolifier.github.io/benchmark](https://poolifier.github.io/benchmark).
274 ## [2.7.1] - 2023-09-20
278 - Ensure worker message listener used one time are removed after usage.
280 ## [2.7.0] - 2023-09-19
284 - Fix task stealing related tasks queue options handling at runtime.
288 - Rename `listTaskFunctions()` to `listTaskFunctionNames()` in pool and worker API.
292 - Add `hasTaskFunction()`, `addTaskFunction()`, `removeTaskFunction()`, `setDefaultTaskFunction()` methods to pool API: [PR #1148](https://github.com/poolifier/poolifier/pull/1148).
293 - Stricter worker constructor arguments validation.
295 ## [2.6.45] - 2023-09-17
299 - Disable publication on GitHub packages registry on release until authentication issue is fixed.
303 - Add `startWorkers` to pool options to whether start the minimum number of workers at pool initialization or not.
304 - Add `start()` method to pool API to start the minimum number of workers.
305 - Add `taskStealing` and `tasksStealingOnPressure` to tasks queue options to whether enable task stealing or not and whether enable tasks stealing under back pressure or not.
306 - Continuous internal benchmarking: [https://poolifier.github.io/benchmark-results/dev/bench](https://poolifier.github.io/benchmark-results/dev/bench).
308 ## [2.6.44] - 2023-09-08
312 - Use a dedicated PAT to publish on GitHub packages registry.
316 - Publish on GitHub packages registry on release.
320 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
322 ## [2.6.43] - 2023-09-08
326 - Publish on GitHub packages registry on release.
330 - Switch from rome to biome: [PR #1128](https://github.com/poolifier/poolifier/pull/1128).
332 ## [2.6.42] - 2023-09-06
336 - Optimize hot code paths implementation: avoid unnecessary branching, add and use optimized helpers (min, max), use reduce() array helper, ...
338 ## [2.6.41] - 2023-09-03
342 - Optimize worker choice strategies implementation.
344 ## [2.6.40] - 2023-09-01
348 - Do not pre-choose in WRR worker choice strategy to avoid bias.
349 - Avoid array out of bound in worker choice strategies after worker node removal.
351 ## [2.6.39] - 2023-08-30
355 - Fix race condition in worker choice strategies at worker node info querying while not yet initialized.
357 ## [2.6.38] - 2023-08-30
361 - Bundle typescript types declaration into one file.
365 - Improve interleaved weighted round robin worker choice strategy implementation.
367 ## [2.6.37] - 2023-08-28
371 - Ensure unused worker usage statistics are deleted at runtime.
375 - Rename worker choice strategy options `choiceRetries` to `retries`.
376 - Avoid unnecessary branching in worker choice strategies.
378 ## [2.6.36] - 2023-08-27
382 - Fix pool `execute()` arguments check.
386 - Make continuous tasks stealing algorithm less aggressive.
387 - Fine tune tasks stealing algorithm under back pressure.
389 ## [2.6.35] - 2023-08-25
393 - Don't account worker usage statistics for tasks that have failed.
394 - Fix pool information runtime and wait time median computation.
398 - Update simple moving average implementation to use a circular buffer.
399 - Update simple moving median implementation to use a circular buffer.
400 - Account for stolen tasks in worker usage statistics and pool information.
404 - Continuous tasks stealing algorithm.
406 ## [2.6.34] - 2023-08-24
410 - Avoid cascading tasks stealing under back pressure.
414 - Add fastpath to queued tasks rescheduling.
416 ## [2.6.33] - 2023-08-24
420 - Fix queued tasks rescheduling.
424 - Rename tasks queue options `queueMaxSize` to `size`.
428 - Task stealing scheduling algorithm if tasks queueing is enabled.
430 ## [2.6.32] - 2023-08-23
434 - Ensure no task can be executed when the pool is destroyed.
438 - Add `queueMaxSize` option to tasks queue options.
439 - Add O(1) deque implementation implemented with doubly linked list and use it for tasks queueing.
440 - Add tasks stealing algorithm when a worker node queue is back pressured if tasks queueing is enabled.
442 ## [2.6.31] - 2023-08-20
446 - Fix worker choice strategy retries mechanism in some edge cases.
450 - Make orthogonal worker choice strategies tasks distribution and created dynamic worker usage.
451 - Remove the experimental status of the `LEAST_ELU` worker choice strategy.
453 ## [2.6.30] - 2023-08-19
457 - Ensure pool event `backPressure` is emitted.
458 - Ensure pool event `full` is emitted only once.
459 - Ensure worker node cannot be instantiated without proper arguments.
461 ## [2.6.29] - 2023-08-18
465 - Fix race condition between readiness and task functions worker message handling at startup.
466 - Fix duplicate task function worker usage statistics computation per task function.
467 - Update task function worker usage statistics if and only if there's at least two different task functions.
468 - Fix race condition at task function worker usage executing task computation leading to negative value.
472 - Add back pressure detection on the worker node queue. Event `backPressure` is emitted when all worker node queues are full (worker node queue size >= poolMaxSize^2).
473 - Use back pressure detection in worker choice strategies.
474 - Add worker choice strategies retries mechanism if no worker is eligible.
476 ## [2.6.28] - 2023-08-16
480 - Ensure pool workers are properly initialized.
484 - HTTP server pool examples: express-cluster, express-hybrid.
488 - Remove now useless branching in worker hot code path.
490 ## [2.6.27] - 2023-08-15
494 - Add `KillHandler` type definition to exported types.
498 - Add `destroy` event to pool API.
500 ## [2.6.26] - 2023-08-15
504 - Add kill handler to worker options allowing to execute custom code when worker is killed.
505 - Add `listTaskFunctions()` method to pool API.
506 - SMTP client pool example: nodemailer.
508 ## [2.6.25] - 2023-08-13
512 - HTTP server pool examples: fastify-cluster, fastify-hybrid.
513 - WebSocket server pool examples: ws-cluster, ws-hybrid.
515 ## [2.6.24] - 2023-08-12
519 - Add array of transferable objects to the `execute()` method arguments.
520 - WebSocket server pool examples: ws-worker_threads.
522 ## [2.6.23] - 2023-08-11
526 - Fix pool busyness semantic when tasks queueing is enabled: the pool is busy when the number of executing tasks on each worker has reached the maximum tasks concurrency per worker.
530 - HTTP client pool examples: fetch, node-fetch and axios with multiple task functions.
531 - HTTP server pool examples: express-worker_threads, fastify-worker_threads.
533 ## [2.6.22] - 2023-08-10
537 - Add missing `types` field to package.json `exports`.
541 - Structure markdown documentation (PR #811).
543 ## [2.6.21] - 2023-08-03
547 - Improve code documentation.
548 - Code refactoring and cleanup for better maintainability and readability.
550 ## [2.6.20] - 2023-07-21
554 - Fix queued tasks redistribution on error task execution starvation.
555 - Ensure tasks queueing per worker condition is untangled from the pool busyness semantic.
559 - Drastically reduce lookups by worker in the worker nodes.
561 ## [2.6.19] - 2023-07-20
565 - Dedicated internal communication channel for worker_threads pools.
567 ## [2.6.18] - 2023-07-19
571 - Code refactoring and cleanup for better maintainability and readability. Bundle size is a bit smaller.
573 ## [2.6.17] - 2023-07-16
577 - Add `listTaskFunctions()` method to worker API.
579 ## [2.6.16] - 2023-07-12
583 - Fix pool startup detection.
584 - Fix worker task functions handling.
586 ## [2.6.15] - 2023-07-11
590 - Take into account worker node readiness in worker choice strategies.
592 ## [2.6.14] - 2023-07-10
596 - Fix task function statistics tracking.
598 ## [2.6.13] - 2023-07-10
602 - Add per task function statistics tracking.
603 - Add public methods to manipulate the worker task functions at runtime.
605 ## [2.6.12] - 2023-07-09
609 - Workaround import issue with `node:os` module in node 16.x.x.
611 ## [2.6.11] - 2023-07-09
615 - Fix pool readiness semantic.
617 ## [2.6.10] - 2023-07-08
621 - Ensure workers are not recreated on error at pool startup.
625 - Add `ready` and `strategy` fields to pool information.
626 - Add pool event `ready` to notify when the number of workers created in the pool has reached the maximum size expected and are ready.
627 - Add dynamic pool sizing checks.
629 ## [2.6.9] - 2023-07-07
633 - Recreate the right worker type on uncaught exception.
637 - Add minimum and maximum to internal measurement statistics.
638 - Add `runTime` and `waitTime` to pool information.
639 - Check worker inactive time only on dynamic worker.
641 ## [2.6.8] - 2023-07-03
645 - Brown paper bag release to fix version handling in pool information.
647 ## [2.6.7] - 2023-07-03
651 - Ensure worker queued tasks at error are reassigned to other pool workers.
655 - Add pool `utilization` ratio to pool information.
656 - Add `version` to pool information.
657 - Add worker information to worker nodes.
659 ## [2.6.6] - 2023-07-01
663 - Add safe helper `availableParallelism()` to help sizing the pool.
667 - Ensure message handler is only registered in worker.
669 ## [2.6.5] - 2023-06-27
673 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
677 - Artificial version bump to 2.6.5 to workaround publication issue.
678 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
679 - Ensure pool event is emitted before task error promise rejection.
680 - Fix queued tasks count computation.
684 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
686 ## [2.6.4] - 2023-06-27
690 - Cluster pools tasks execution are not working by using ESM files extension: https://github.com/poolifier/poolifier/issues/782
694 - Ensure cluster pool `destroy()` gracefully shutdowns worker's server.
695 - Ensure pool event is emitted before task error promise rejection.
696 - Fix queued tasks count computation.
700 - Remove unneeded worker_threads worker `MessageChannel` internal usage for IPC.
702 ## [2.6.3] - 2023-06-19
706 - Ensure no tasks are queued when trying to soft kill a dynamic worker.
707 - Update strategies internals after statistics computation.
711 - Optimize O(1) queue implementation.
713 ## [2.6.2] - 2023-06-12
717 - Fix new worker use after creation in dynamic pool given the current worker choice strategy.
719 ## [2.6.1] - 2023-06-10
723 - Add worker choice strategy documentation: [README.md](./docs/worker-choice-strategies.md).
727 - Fix average statistics computation: ensure failed tasks are not accounted.
729 ## [2.6.0] - 2023-06-09
733 - Add `LEAST_ELU` worker choice strategy (experimental).
734 - Add tasks ELU instead of runtime support to `FAIR_SHARE` worker choice strategy.
738 - Refactor pool worker node usage internals.
739 - Breaking change: refactor worker choice strategy statistics requirements: the syntax of the worker choice strategy options has changed.
740 - Breaking change: pool information `info` property object fields have been renamed.
744 - Fix wait time accounting.
745 - Ensure worker choice strategy `LEAST_BUSY` accounts also tasks wait time.
746 - Ensure worker choice strategy `LEAST_USED` accounts also queued tasks.
748 ## [2.5.4] - 2023-06-07
752 - Add Event Loop Utilization (ELU) statistics to worker tasks usage.
756 - Compute statistics at the worker level only if needed.
757 - Add `worker_threads` options to thread pool options.
761 - Make the `LEAST_BUSY` strategy only relies on task runtime.
763 ## [2.5.3] - 2023-06-04
767 - Refine pool information content.
768 - Limit pool internals public exposure.
770 ## [2.5.2] - 2023-06-02
774 - Add `taskError` pool event for task execution error.
775 - Add pool information `info` property to pool.
776 - Emit pool information on `busy` and `full` pool events.
778 ## [2.5.1] - 2023-06-01
782 - Add pool option `restartWorkerOnError` to restart worker on uncaught error. Default to `true`.
783 - Add `error` pool event for uncaught worker error.
785 ## [2.5.0] - 2023-05-31
789 - Switch pool event emitter to `EventEmitterAsyncResource`.
790 - Add tasks wait time accounting in per worker tasks usage.
791 - Add interleaved weighted round robin `INTERLEAVED_WEIGHTED_ROUND_ROBIN` worker choice strategy (experimental).
795 - Renamed worker choice strategy `LESS_BUSY` to `LEAST_BUSY` and `LESS_USED` to `LEAST_USED`.
797 ## [2.4.14] - 2023-05-09
801 - Ensure no undefined task runtime can land in the tasks history.
802 - Fix median computation implementation once again.
806 - Unit tests for median and queue implementations.
808 ## [2.4.13] - 2023-05-08
812 - Fix worker choice strategy options validation.
813 - Fix fair share worker choice strategy internals update: ensure virtual task end timestamp is computed at task submission.
815 ## [2.4.12] - 2023-05-06
819 - Support multiple task functions per worker.
820 - Add custom worker weights support to worker choice strategies options.
824 - Use O(1) queue implementation for tasks queueing.
828 - Fix median computation implementation.
829 - Fix fair share worker choice strategy internals update.
831 ## [2.4.11] - 2023-04-23
835 - Optimize free worker finding in worker choice strategies.
837 ## [2.4.10] - 2023-04-15
841 - Fix typescript type definition for task function: ensure the input data is optional.
842 - Fix typescript type definition for pool execute(): ensure the input data is optional.
844 ## [2.4.9] - 2023-04-15
848 - Add tasks queue enablement runtime setter to pool.
849 - Add tasks queue options runtime setter to pool.
850 - Add worker choice strategy options runtime setter to pool.
854 - Remove the tasks queuing experimental status.
858 - Fix task function type definition and validation.
859 - Fix worker choice strategy options handling.
861 ## [2.4.8] - 2023-04-12
865 - Fix message between main worker and worker type definition for tasks.
866 - Fix code documentation.
868 ## [2.4.7] - 2023-04-11
872 - Add worker tasks queue options to pool options.
876 - Fix missing documentation.
878 ## [2.4.6] - 2023-04-10
882 - Ensure one task at a time is executed per worker with tasks queueing enabled.
883 - Properly count worker executing tasks with tasks queueing enabled.
885 ## [2.4.5] - 2023-04-09
889 - Use monotonic high resolution timer for worker tasks runtime.
890 - Add worker tasks median runtime to statistics.
891 - Add worker tasks queue (experimental).
893 ## [2.4.4] - 2023-04-07
897 - Add `PoolEvents` enumeration and `PoolEvent` type.
901 - Destroy worker only on alive check.
903 ## [2.4.3] - 2023-04-07
907 - Fix typedoc generation with inheritance.
909 ## [2.4.2] - 2023-04-06
913 - Add `full` event to dynamic pool.
914 - Keep worker choice strategy in memory for conditional reuse.
918 - Fix possible negative worker key at worker removal in worker choice strategies.
920 ## [2.4.1] - 2023-04-05
924 - Optimize worker choice strategy for dynamic pool.
928 - Ensure dynamic pool does not alter worker choice strategy expected behavior.
930 ## [2.4.0] - 2023-04-04
934 - Add `LESS_BUSY` worker choice strategy.
938 - Optimize worker storage in pool.
939 - Optimize worker alive status check.
940 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
941 - Optimize `LESS_USED` worker choice strategy.
942 - Update benchmark versus external threads pools.
943 - Optimize tasks usage statistics requirements for worker choice strategy.
947 - Ensure trimmable characters are checked at pool initialization.
948 - Fix message id integer overflow.
949 - Fix pool worker removal in worker choice strategy internals.
950 - Fix package publication with pnpm.
952 ## [2.4.0-3] - 2023-04-04
956 - Add `LESS_BUSY` worker choice strategy.
960 - Optimize worker storage in pool.
961 - Optimize worker alive status check.
962 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
963 - Optimize `LESS_USED` worker choice strategy.
964 - Update benchmark versus external threads pools.
968 - Ensure trimmable characters are checked at pool initialization.
969 - Fix message id integer overflow.
970 - Fix pool worker removal in worker choice strategy internals.
971 - Fix package publication with pnpm.
973 ## [2.4.0-2] - 2023-04-03
977 - Add `LESS_BUSY` worker choice strategy.
981 - Optimize worker storage in pool.
982 - Optimize worker alive status check.
983 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
984 - Optimize `LESS_USED` worker choice strategy.
988 - Ensure trimmable characters are checked at pool initialization.
989 - Fix message id integer overflow.
990 - Fix pool worker removal in worker choice strategy internals.
991 - Fix package publication with pnpm.
993 ## [2.4.0-1] - 2023-04-03
997 - Add `LESS_BUSY` worker choice strategy.
1001 - Optimize worker storage in pool.
1002 - Optimize worker alive status check.
1003 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1004 - Optimize `LESS_USED` worker choice strategy.
1008 - Ensure trimmable characters are checked at pool initialization.
1009 - Fix message id integer overflow.
1010 - Fix pool worker removal in worker choice strategy internals.
1012 ## [2.4.0-0] - 2023-04-03
1016 - Add `LESS_BUSY` worker choice strategy.
1020 - Optimize worker storage in pool.
1021 - Optimize worker alive status check.
1022 - BREAKING CHANGE: Rename worker choice strategy `LESS_RECENTLY_USED` to `LESS_USED`.
1023 - Optimize `LESS_USED` worker choice strategy.
1027 - Ensure trimmable characters are checked at pool initialization.
1028 - Fix message id integer overflow.
1029 - Fix pool worker removal in worker choice strategy internals.
1031 ## [2.3.10] - 2023-03-18
1035 - Fix package.json `exports` syntax for ESM and CommonJS.
1039 - Permit SemVer pre-release publication.
1041 ## [2.3.10-2] - 2023-03-18
1045 - Fix package.json `exports` syntax for ESM and CommonJS.
1047 ## [2.3.10-1] - 2023-03-18
1051 - Permit SemVer pre-release publication.
1053 ## [2.3.10-0] - 2023-03-18
1057 - Fix package.json `exports` syntax for ESM and CommonJS.
1059 ## [2.3.9] - 2023-03-18
1063 - Introduce ESM module support along with CommonJS one.
1067 - Fix brown paper bag bug referencing the same object literal.
1069 ## [2.3.8] - 2023-03-18
1073 - Switch internal benchmarking code to benny.
1074 - Switch to TypeScript 5.x.x.
1075 - Switch rollup bundler plugins to core ones.
1076 - Switch to TSDoc syntax.
1077 - Enforce conventional commits.
1081 - Fix random integer generator.
1082 - Fix worker choice strategy pool type identification at initialization.
1084 ## [2.3.7] - 2022-10-23
1088 - Switch to open collective FOSS project funding platform.
1089 - Switch to ts-standard linter configuration on TypeScript code.
1093 - Fixed missing async on pool execute method.
1094 - Fixed typing in TypeScript example.
1095 - Fixed types in unit tests.
1097 ## [2.3.6] - 2022-10-22
1101 - Cleanup pool attributes and methods.
1102 - Refine error types thrown.
1106 - Fix continuous integration build on windows.
1107 - Fix code coverage reporting by using c8 instead of nyc.
1109 ## [2.3.5] - 2022-10-21
1113 - Improve benchmarks: add IO intensive task workload, add task size option, integrate code into linter.
1114 - Optimize tasks usage lookup implementation.
1118 - Fix missed pool event emitter type export.
1119 - Fix typedoc documentation generation.
1121 ## [2.3.4] - 2022-10-17
1125 - Fully automate release process with release-it.
1129 - Optimize fair share task scheduling algorithm implementation.
1130 - Update benchmark versus external pools results with latest version.
1132 ## [2.3.3] - 2022-10-15
1136 - Add support for [cluster settings](https://nodejs.org/api/cluster.html#cluster_cluster_settings) in cluster pool options.
1138 ## [2.3.2] - 2022-10-14
1142 - Optimize fair share worker selection strategy implementation.
1146 - Fix WRR worker selection strategy: ensure the condition triggering the round robin can be fulfilled.
1148 ## [2.3.1] - 2022-10-13
1152 - Pool worker choice strategies:
1153 - `WorkerChoiceStrategies.WEIGHTED_ROUND_ROBIN` strategy based on weighted round robin scheduling algorithm using tasks execution time for now.
1154 - `WorkerChoiceStrategies.FAIR_SHARE` strategy based on fair share scheduling algorithm using tasks execution time for now.
1156 ## [2.2.2] - 2022-10-09
1160 - Fixed `README.md` file.
1162 ## [2.2.1] - 2022-10-08
1166 - Dynamic worker choice strategy change at runtime.
1168 ## [2.2.0] - 2022-01-05
1170 ### Breaking Changes
1172 - Support only Node.js version 16.x.x for cluster pool: upstream cluster API have changed on that version.
1174 ## [2.1.0] - 2021-08-29
1178 - Add an optional pool option `messageHandler` to `PoolOptions<Worker>` for registering a message handler callback on each worker.
1180 ### Breaking Changes
1182 - `AbstractWorker` class `maxInactiveTime`, `killBehavior` and `async` attributes have been removed in favour of the same ones in the worker options `opts` public attribute.
1183 - `AbstractWorker` class `lastTask` attribute have been renamed to `lastTaskTimestamp`.
1184 - `AbstractWorker` class `interval` attribute have been renamed to `aliveInterval`.
1185 - `AbstractWorker` class cannot be instantiated without specifying the `mainWorker` argument referencing the main worker.
1187 ## [2.0.2] - 2021-05-12
1191 - Fix `busy` event emission on fixed pool type
1193 ## [2.0.1] - 2021-03-16
1197 - Check if pool options are properly set.
1198 - `busy` event is emitted on all pool types.
1200 ## [2.0.0] - 2021-03-01
1204 - Now a thread/process by default is not deleted when the task submitted take more time than maxInactiveTime configured (issue #70).
1206 ### Breaking Changes
1208 - `FullPool` event is now renamed to `busy`.
1209 - `maxInactiveTime` on `ThreadWorker` default behavior is now changed, if you want to keep the old behavior set `killBehavior` to `KillBehaviors.HARD`.
1210 _Find more details on our JSDoc._
1212 - `maxTasks` option on `FixedThreadPool` and `DynamicThreadPool` is now removed since is no more needed.
1214 - We changed some internal structures, but you shouldn't be too affected by them as these are internal changes.
1216 ### Pool options types declaration merge
1218 `FixedThreadPoolOptions` and `DynamicThreadPoolOptions` type declarations have been merged to `PoolOptions<Worker>`.
1220 #### New `export` strategy
1224 const DynamicThreadPool = require('poolifier/lib/dynamic')
1226 const { DynamicThreadPool } = require('poolifier/lib/dynamic')
1229 But you should always prefer just using
1232 const { DynamicThreadPool } = require('poolifier')
1235 #### New type definitions for input data and response
1237 For cluster worker and worker-thread pools, you can now only send and receive structured-cloneable data.
1238 _This is not a limitation by poolifier but Node.js._
1240 #### Public property replacements
1242 `numWorkers` property is now `numberOfWorkers`
1244 #### Internal (protected) properties and methods renaming
1246 These properties are not intended for end users
1248 - `id` => `nextMessageId`
1250 These methods are not intended for end users
1252 - `_chooseWorker` => `chooseWorker`
1253 - `_newWorker` => `createWorker`
1254 - `_execute` => `internalExecute`
1255 - `_chooseWorker` => `chooseWorker`
1256 - `_checkAlive` => `checkAlive`
1258 - `_runAsync` => `runAsync`
1260 ## [1.1.0] - 2020-05-21
1264 - ThreadWorker support async functions as option
1265 - Various external library patches
1267 ## [1.0.0] - 2020-01-24
1271 - FixedThreadPool implementation
1272 - DynamicThreadPool implementation
1273 - WorkerThread implementation to improve developer experience